JPH0431123Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drive device for a mobile agricultural machine such as a management machine or tiller that performs various management tasks such as weeding during tillage.

(Prior art) For example, when digging a trench with a power tiller and forming ridges on the left and right sides of the machine, the pair of left and right drive wheels are configured to run on the bottom of the ditch. They are attached to the left and right sides of the output shaft located at the lower end of the transmission case, and the width between the left and right drive wheels had to be wide due to the thickness of the transmission case. For this reason, if the groove width between the ridges is narrow, the drive wheel will ride on the ridges.

(Problem that the invention aims to solve) In this way, conventionally, the gap between the left and right drive wheels was large, so it was not possible to form the groove width between the furrows narrowly. Even if we wanted to increase the ratio of the ridges formed on the left and right sides of the fuselage by making it narrower, there was a drawback that this could not be achieved.

Therefore, the present invention solves the above-mentioned drawbacks by arranging the pair of left and right drive wheels in a V-shape to minimize the width of the groove bottom when forming a ridge, thereby reducing the number of ridges per unit area. It is an object of the present invention to provide a drive device for a mobile agricultural machine that significantly improves the formation rate of.

(Means for Solving the Problems) In order to achieve the above object, the present invention has an output shaft that is mounted in the left and right direction of the machine body at the lower end of the transmission case in the center of the machine body, and that supports this output shaft. Inclined bosses whose outer periphery axes are inclined downward are symmetrically fixed to the left and right outer walls of the transmission case, and the center holes of the left and right drive wheels are rotatably fitted to the outer periphery of each inclined boss, respectively, for driving. The wheels are arranged in a V-shape coaxially with the inclined boss, and a plurality of engagement grooves are provided in the same phase on the inner periphery of the center hole of these driving wheels and on the outer periphery of both left and right ends of the output shaft. A steel ball is interposed between these inner and outer engagement grooves to connect the drive wheel to the output shaft.

(Function) In the present invention, the rotation of the output shaft is transmitted to the V-shaped driving wheel through the steel ball, and the driving wheel rotates in a V-shaped inclined state. Since the part that receives the wheel load and the part that supports the axle are integrally formed by the inclined boss, the joint part can be constructed extremely compactly, and mud can be prevented from entering the joint part. .

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view of a tiller (Taylor) to which the present invention is applied.

In the figure, 2 is an engine mounted at the rear of the chassis 1, and this engine 2 drives each part via a belt as described later. Reference numeral 3 denotes a rotary tiller section provided at the front lower part of the chassis 1, and is rotatably connected to the output shaft 4 of the engine via a chain.

Reference numeral 5 denotes a pair of left and right drive wheels according to the present invention, and a drive mechanism for the drive wheels 5 will be described later.

Reference numeral 6 denotes a soil shield plate that can be adjusted according to the width of the ridge when forming the ridge. Moreover, 7 is a handle for operation.

Next, the drive mechanism for the drive wheels according to the present invention will be explained with reference to FIG.

In the figure, reference numeral 8 denotes a mission case disposed at the center of the machine body, and an inclined boss 9 whose axis line is inclined downwardly on the outer periphery is symmetrically fixed to the outer wall of the lower end of the mission case 8. An output shaft 10 is inserted through the support holes of these inclined bosses 9 and is rotatable by a bearing 11.

Furthermore, the center holes of the left and right drive wheels 5, 5 are rotatably fitted to the outer periphery of each inclined boss 9 via bearings 12, respectively, so that the left and right drive wheels 5, 5 are connected to the inclined bosses 9, 9. Arrange coaxially in a V-shape.

Furthermore, a plurality of engagement grooves 14 and 15 are formed in the same phase on the inner periphery of the center hole of the drive wheels 5 and 5 and on the outer periphery of the output wheel 13 fixed to both left and right ends of the output shaft 10, respectively. . A steel ball 16 is interposed between these engagement grooves 14 and the engagement groove 15, and the drive wheels 5, 5
is connected to the output shaft 10. Thereby, the rotation of the output shaft 10 is transmitted to the drive wheels 5, 5.

17 is a sprocket fixed to the center of the output shaft 10, and 18 is a chain attached to the sprocket 17. Reference numeral 19 is a retainer for preventing the drive wheel 5 from coming off, and reference numeral 20 is a rim into which the tire 21 is fitted. Further, 22 is a dustproof lid provided on the side surface of the drive wheel 5.

In such a configuration, when the output shaft 10 shown in FIG. 2 is rotated by the chain 18 due to the drive of the engine 2, the output shaft 13 fixed to the left and right ends of the output shaft 10 is rotated. At this time, since the output wheel 13 and the drive wheel 5 are connected via the steel ball 16, the rotational force of the output wheel 13, that is, the rotational force of the output shaft 10, is transmitted to the drive wheel 5. At that time, steel ball 1
6 reciprocates in the longitudinal direction within the engagement grooves 14 and 15, so the drive wheel 5 moves along the outer periphery of the inclined boss 9.
Rotates smoothly while maintaining a straight posture.

Therefore, in this embodiment, the interval between the lower halves of the left and right drive wheels is narrow, and therefore, even if the groove bottom is extremely narrow after ridges are formed on both sides by the rotary tiller 3, the bottom of the groove is The driving wheels 5, 5 arranged in a V-shape on the left and right sides can move forward while stably supporting the aircraft body without cutting the hem of the ridges.

However, if the drive wheels are tilted excessively, the propulsion force of the aircraft will be reduced, and the drive wheels will hit the grooves, especially in the case of deep grooves. Therefore, it is preferable to tilt the center line of the drive wheels at an angle of 8 to 10 degrees with respect to the horizontal line. It is better to do so.

(Effect of the invention) As explained above, according to the invention, the left and right drive wheels are arranged in a V-shape, the lower half of the drive wheels, that is, the left and right distance between the ground contact parts is narrowed, and output is output to each drive wheel. Since the rotation of the shaft can be transmitted smoothly, the width of the groove bottom can be made as small as possible when forming ridges or grooves, which greatly improves the rate of ridge formation per unit area, and also reduces the width of the groove bottom when forming ridges or grooves. Work can be done smoothly, and the machine is more stable than a unicycle. Further, since the portion receiving the load of the wheel and the portion supporting the axle are integrally formed by the inclined boss, the joint portion can be configured extremely compactly. It also has the effect of preventing mud from entering the joint.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a power cultivator embodying the present invention, and FIG. 2 is a partial sectional view showing an example of the drive mechanism for the drive wheels shown in FIG. 1. 5 is a drive wheel, 8 is a transmission case, 9 is an inclined boss, 10 is an output shaft, 14 and 15 are engagement grooves, 16
is a steel ball.

Claims (1)

[Claims for Utility Model Registration] An output shaft is attached to the lower end of the transmission case in the center of the machine body in the left-right direction of the machine body, and an inclined boss with an axis on the outer periphery that supports the output shaft is tilted downward. The drive wheels are fixed symmetrically to the left and right outer walls of the case, and the center holes of the left and right drive wheels are rotatably fitted to the outer periphery of each inclined boss, and the drive wheels are arranged coaxially with the inclined boss in a V-shape. , However, a plurality of engagement grooves are formed in the same phase on the inner periphery of the center hole of these drive wheels and the outer periphery of both left and right ends of the output shaft, and steel balls are inserted between these inner and outer engagement grooves. A drive device for mobile agricultural machinery that connects a drive wheel to an output shaft through an intervening device.